I.T. lesson

Answer the following questions in your books, using the website provided (or others you can find) to help you.

1. What are the three sections of pregnancy called?
2. Whereabouts are sperm produced?
3. Make a short list of health problems that may be faced by pregnant mothers:
4. If a baby has been developing inside the mother for 35 weeks and is 31cm long, is it larger or smaller tan average?
5. Try this crossword, checking the answers as you go. http://www.ntscience.co.uk/science-crossword/7b-reproductionj.html
6. Once you have completed the activity on the last link, explain one thing that the game is correct about and one thing that doesn't happen before a baby is born.

http://www.bbc.co.uk/health/tools/pregnancy_calendar/ - Use this website to help you answer the questions about different stages of pregnancy.

http://www.bbc.co.uk/schools/ks3bitesize/science/organisms_behaviour_health/reproduction/activity.shtml - Use this website to go through the material covered in the A & E unit.  Take the test at the end and see how much you can remember!
http://www.nlm.nih.gov/medlineplus/healthproblemsinpregnancy.html - Help with the health problems associated with pregnancy.
http://www.babycentre.co.uk/pregnancy/fetaldevelopment/chart/ - Gives information about how large babies are at different stages.

Try this once you're finished - http://www.miniclip.com/games/baby-blimp/en/

A & E

Now that we've finished our section of the reproduction section, make sure that you remember the three different stages we looked at - fertilisation, pregnancy and birth.
For fertilisation, make sure you know which body parts are involved (the testes and penis, ovaries, fallopian/egg tubes, uterus, egg and sperm) and the steps that have to occur.
For pregnancy, know how long it takes and and things that the foetus does during this time.
For birth, remember the steps in order as well as problems that can occur (breeches, caesareans).  I'll have a talk with Mrs. Lynch to work out when the test will be and let you know, we'll have a revision lesson again so don't worry!

Revision sheets

Here are sample answers for the revision sheet from class today.  Make sure you have a look at it before the test on Friday!
1. For the water in a kettle, you need to draw the particles in a liquid (slightly spread out, moving slowly).  The steam occurs once the water has wamred up and particles have changed to gas.  These will be moving around very fast and more spread out than the liquid below them.
2. To make something go from a solid to a liquid or a gas it has to be heated (when energy goes in).  If something is cooling down from a gas to a liquid or liquid to solid (like the ice cream mixture), energy must be taken out of it.
3. Chemical changes

• are irreversible
• Can have colour changes
• Can produce new smells

4. Water boiling is a physical change not a chemical one as it can be reversed (cooling the steam will produce liquid water again).
5. The crepe directly touching the pan is heated by conduction.
6.

• Convection - Boiling a potato
• Radiation - Cooking with a microwave or a grill.

7. Raw eggs contain long string-like particles called proteins.  Normally they float around separately and keep a certain shape, but when they are heated they change shape and stick together.  This forms a solid and is an irreversible chemical change.
8. When ice cream forms by cooling a liquid and making a solid, water in the liquid becomes ice crystals.  The longer the mixture takes to freeze, the larger the ice crystals become.  This gives the ice cream a 'rough' feel in your mouth and makes it taste bad.  If it is frozen quickly, the crystals stay small and it tastes smooth.

Good luck, please come and find me if you have any questions!